Diffusion is the spreading of particles from an area of high concentration to low concentration.

3 of 5

Name three substances that can diffuse through a plant cell membrane and two that cannot.

oxygen, glucose and water are able to pass through the cell membrane,unlike starch and protein molecules which cannot.

4 of 5

name and state the functions of the three muscles in the stomach.

1) Muscular tissue- moves the stomach wall to churn up food. 2) Glandular tissue- makes the digestive juices to break down the food. 3) Epithelial tissue- a fine protective tissue which covers the inside and outside of the stomach.